350 .21 Off Road Buggy Engine (Standard Plug) by Losi

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This is the Losi 350 .21 Off Road Buggy Engine. The Losi 350 Engine is specifically built for 1/8-scale off-road buggies. This potent .21-sized performance engine is legal for sanctioned racing worldwide and offers great styling with a color anodized cooling head.

The engine features a large bore carburetor design which provides ample intake capacity, creating the kind of powerful throttle response and acceleration you want for any track or terrain. Additionally, the high and low-speed needles are designed for easy adjustment, letting you fine-tune the 350 Engine for any temperature or weather conditions.


  • Economical operation creates the best power per dollar available
  • Losi styling engine with excellent parts availability and carb selection due to commonality with the 454 and 427

Displacement: .21 cubic inches
Bore: 0.641 inches (16.27mm)
Stroke: 0.659 inches (16.75mm)
Engine (Only) Weight: 12.346 oz (350g)
RPM Range: 31,000
Fuel: Nitro
Carb Type: Two-needle slide aluminum/steel
Crank Type: High-carbon steel, precision ground and polished with "turbo grooves"

This product was added to our catalog on March 12, 2012.

Wade Phillips
Wednesday, Sep 21 2016 (4 weeks ago)
Losi 350 .21 Off Road Buggy Engine (Standard Plug)
Would be good for $100 or <, sadly the quality of the parts pales to other engines around $150
Michel Champagne
Sunday, May 22 2016 (5 months ago)
Losi 350 .21 Off Road Buggy Engine (Standard Plug)
I had a 350 in my losi losi eight 2.0 since its purchase, easy engine start, and tuned but don't hold the settings. What about the vapor-lock problem with this engine. Once the engine's hot, can't restart, I had to wait until the temperature drops down to about 125 F. The engine is aging badly o'ring of carburetor that quickly wears HSN who unscrewed alone by the vibration,front bearing leak after 3 liters of fuel, air leakage around. Engine worn out after five gallons.I rebuilt the entire block, sleeve, piston, bearing and conrod, after-five gallons later the engine worn out again.